Sitrans FUS380 two track flow meter

SITRANS FUS380 Two Track Flowmeter

  • Accuracy +/- 0.5% of flow rate
  • Range of Sizes Available Nominal sizes from DN50 to DN1200 (2 - 48 inch) available
  • Choice of Power Options Can be supplied as a battery or mains powered flow meter
  • Ideal for Energy Measurement Can be combined with FUE950 to provide high resolution energy measurement
Product Options


The 2-track SITRANS FUS380 flowmeter can be supplied as a battery or mains-powered unit and is designed to measure water flow in local networks, boiler stations, substations, chiller plants and other general water applications. The type-approved flowmeter version is named SITRANS FUE380. Technically, the SITRANS FUS380 and SITRANS FUE380 are completely identical, with the only difference being the calibration limit and the type approval for custody transfer.

The 2-track design of the FUS 380 ensures maximum accuracy under short inlet conditions. The flowmeter consists of a flow sensor pipe, 4 transducers/transducer cables and a SITRANS FUS080 transmitter. When ordering a compact version the transducer cables are pre-mounted and ready for installation. Compact mounting is only possible up to 120 °C (248 °F). The sensor must be isolated to protect the transmitter from heat. The unit is available in a compact or a remote version with up to 30 meter distance from flowmeter to transmitter.

The flowmeter digital output is often used as input for an energy meter or as input for digital systems for remote reading. SITRANS FUS380 has two digital output functions that can be individually selected, and optional MODBUS RTU communication modules. Pulse output rate is defined when ordering. If the flowmeter forms part of an energy meter system for custody transfer, no further approvals are needed, except possible local approvals on the flowmeter

The FUS380 is available in an IP67/NEMA 4X/6 enclosure.The main application for the transmitter is measurement of water flow in heat meter system or chilled water.


  • Battery-powered up to 6 years
  • Fast measuring frequency 20 Hz/0.5 Hz (230 V AC/Battery)
  • Easy one-button straight forward display
  • 115/230 V mains-powered with back-up battery option in case of mains power failure
  • 2-track measuring principle for optimum accuracy
  • Compact or remote mounting
  • Measures on all district water qualities and water conductivities
  • No pressure drop
  • Long-term stability
  • Dynamic range Qmin:Qmax up to 1:400
  • MODBUS RTU/RS 232, RS 485
  • 2 galvanically isolated digital outputs for easy connection to a calculator (potential-free)
  • Bidirectional measurement, with 2 totalizers and outputs

Manufactured by: Siemens-Milltronics
Model: SITRANS FUS380 Two Track Flowmeter

Services offered for this product

  • Sales
  • Rental
  • Installation
  • Calibration
  • Maintenance


Heating plants
Boiler stations
Local networks
Chiller plants
Other general water applications


Measuring Range Qp 15 to 36000 m3/h (depends on size)
Nominal Size From DN 50 to DN 1200 (2" to 48")
Accuracy ±0.5% of flow rate
Operational Pressure Pressure rate max. PN 40
Operation Temperature From 0 to 60 °C (32 to 140 °F)
Medium Temperature From 2 to 200 °C (35.6 to 392 °F)
Bronze: Up to 150 °C (302 °F)
Design 2-track sensor with flanges and integrated transducers
Material Carbon steel
Bronze (only DN 50 to 80)


Related products


No problem. The quick start guide is designed to make installing the flow meters a simple task. Everything you require for set up will be found in the peli-box supplied with the flowmeter.
Every flow meter is tested upon shipping and return as part of our ISO9001 procedure. Also, as part of this procedure, the flow meter is calibrated once a year. If a copy of the calibration certificate is needed let us know.
The flow meters typically provide an accuracy of ±1 to 2% of rate, so if you are measuring 100l/sec then the accuracy is between 98-102l/sec.
We are here to help. If the self-help and quick start guides do not help, then call one of our technical support engineers on +44 (0) 1527 882060. We have supplied and supported many clamp on rental installations throughout Europe.
If the stock is permitting, and all paperwork is received by 12pm then flow meters can usually be available the next day.
Without exception, all our flow meters are tested. If you need a 110v plug instead of the standard 230v plug let us know.
All of our standard transducers will do -40degC to +150degC, but this will depend on your application.
  • Liquid: below 50mm CFLP transducers are required, 50-1000mm CRS-402 transducers and 150-8000mm CRS-401 transducers. All the bits you need can be supplied, and delivered with the meter.
  • Gas: below 80mm CRS-402 is required, for 80-300mm the CRS-401/CRV-310 and for above 300mm the CRW-312 transducers are required.
  • High temperatures: For liquid we can measure +450degC for liquid and for gas/steam +250degC. But please consult RS Hydro.
As long as the pipe is relatively clean, coatings or paint is usually not a problem for clamp on flow meters but if the pipe is corroded or the paintwork has bubbled then a quick sanding down with sandpaper or a wire brush is recommended.
An ultrasonic wall thickness gauge, that measures to within 0.05mm, is provided as standard with all flow meter rental packages.
The screendump facility on the integrated dataloggers on all our flow meters, allows you to photograph any screen and download it to your pc.
We have hired more ultrasonic clamp on flow meters than any other company in Europe. We are now one of the world's largest distributors of GE Panametrics flow meters. We always review your application before hire so no unwanted surprises are encountered. Every effort has been made to make your flow meter hire and enjoyable experience: quick start guides to help you set up with ease, online videos for further help, rugged packaging for extra durability anywhere, and real flow engineers available for online/telephone support.